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Camera Test Chart

COLOR CAMERA GRAY SCALE TEST CHART REFLECTANCE

2017-10-25      Click:35
Two 9-graduated counter current gray scales are arranged on a gray background (D ≈ 0.75), the gray scales being graduated logarithmically (gamma = 0.45). The output of an optimally gamma-corrected camera yields two 9-graduated counter current linear step signals. The contrast range of the gray scales is 50:1.
 
 
The values of the 9-graduated gray scale are as follows:
 

Step Density Remission in % Output voltage in %
1 0.22 60 100
       
2 0.32 48 88.75
       
3 0.44 36 77.5
       
4 0.57 26 66.25
       
5 0.73 19 55
       
6 0.91 12 43.75
       
7 1.13 07 32.5
       
8 1.43 04 21.25
       
9 1.85 01.4 10
       
 
 
The density values are based on a density of BaO4S= 0.
 
The test chart incorporates a super black cavity for the accurate adjustment of camera flare corrections and setting of black level. On both sides of the super black hole 4.5 and 5.5MHz bars with a contrast ratio of 7:1 are located. Above and below the gray scales there are additional markings for the 16:9 format.

 

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